Method for hydrothermally preparing apatite-based molten salt waste solidified body

The invention discloses a method for hydrothermally preparing an apatite-based molten salt waste solidified body, which comprises the following steps: S1, uniformly mixing molten salt waste and hydroxyapatite powder to obtain a mixture; and S2, the mixture is put into a heating device to be subjected to a hydrothermal reaction, and a fused salt waste solidified body is synthesized. Hydroxyapatite has good adsorption capacity, acid-base adjustability, ion exchange capacity and thermal stability. Hydroxyl and calcium ions can be respectively replaced by chlorides and various metal ions, so that the hydroxyapatite is used for fixing the molten salt waste, and waste ions are introduced into crystal lattices through substitution reaction, namely, the hydroxyapatite can be used for effectively curing the molten salt waste. The obtained fused salt waste solidified body has the advantages of large inclusion capacity, good chemical stability and the like, and pollution of the fused salt waste to the ecological environ